/Engine/Source/Runtime/InstallBundleManager/Public/InstallBundleUtils.h
Removes all Required Bundle Names except the ones in the NewRequiredBundlesList. If no NewRequiredBundlesList is supplied, just erases all RequiredBundles. This includes ones loaded from the persistent cache from previous runs. This re-saves the persistent cache file so they will be removed completely.
void ResetRequiredBundles ( const [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & NewRequiredBundles )